Cinder Block CalculatorOpen full calculator ↗

Wall size
Blocks
Cost (optional)

You need

95 blocks

for 80 sq ft, including 5% extra

20 ft4 ft
Area to cover80 sq ft
Blocks per sq ft1.13
Without extra90 blocks
With 5% extra95 blocks

Blocks = area ÷ (block size + joint) × (1 + extra %)